CN1162492C - Application methods for foamable adhesive systems - Google Patents
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- CN1162492C CN1162492C CNB998076775A CN99807677A CN1162492C CN 1162492 C CN1162492 C CN 1162492C CN B998076775 A CNB998076775 A CN B998076775A CN 99807677 A CN99807677 A CN 99807677A CN 1162492 C CN1162492 C CN 1162492C
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/10—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an adhesive surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/06—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/30—Processes for applying liquids or other fluent materials performed by gravity only, i.e. flow coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/34—Applying different liquids or other fluent materials simultaneously
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/04—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving separate application of adhesive ingredients to the different surfaces to be joined
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/08—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers using foamed adhesives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/005—Curtain coaters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08L61/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
- C08L61/28—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with melamine
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2461/00—Presence of condensation polymers of aldehydes or ketones
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/582—Recycling of unreacted starting or intermediate materials
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- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Coating Apparatus (AREA)
- Reinforced Plastic Materials (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Laminated Bodies (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Seal Device For Vehicle (AREA)
- Saccharide Compounds (AREA)
- Epoxy Resins (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Compounds Of Unknown Constitution (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
- Pens And Brushes (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
Abstract
Description
本发明涉及将可发泡胶粘体系中的组分单独施涂到基材上的方法，该体系的硬化剂呈酸性并形成该体系的可发泡能力的一部分。本发明也涉及用于实施该方法的装置。The present invention relates to the separate application to a substrate of the components of a foamable adhesive system, the hardener of which is acidic and which forms part of the foamable capability of the system. The invention also relates to a device for carrying out the method.
可发泡胶粘体系属于本领域公知内容。这类可发泡胶粘体系例如可在需要一起胶粘的那些片材的待施涂胶粘剂表面上呈现不规则性的情况下使用，例如在用于胶合层积材或层压胶合板生产过程中的将木片胶粘在一起的情况。胶粘剂然后将填充这些不规则处，从而得到与无产气物质的胶粘体系相比有改进强度的接合缝。该体系的另一目的是降低木材的用量，这些木材可能为了能在表面平滑施胶，不得不通过例如刨平的方法在胶粘之前被去掉一部分。然而，在已知的可发泡胶粘体系中，可发泡特征例如可通过分别与树脂和硬化剂组分独立的、施胶时被引入到胶粘体系中的产气组合物或混合物来实现。这类可发泡胶粘体系，更具体地聚脲树脂体系，已公开在SU-327224中，其中适宜在引入聚脲树脂固化催化剂的时候将发泡组合物与树脂混合。Foamable adhesive systems are well known in the art. Such foamable adhesive systems are used, for example, where irregularities are present on the surface of the sheets to be glued together where the adhesive is to be applied, for example in the production of glued laminated timber or laminated plywood The case of gluing pieces of wood together. The adhesive will then fill in these irregularities, resulting in a joint with improved strength compared to an adhesive system without gas generating substances. Another purpose of the system is to reduce the amount of wood that may have to be removed before gluing, eg by planing, in order to be able to apply the glue smoothly on the surface. However, in known foamable adhesive systems, the foamable character can be achieved, for example, by a gas-generating composition or mixture which is introduced into the adhesive system during sizing, independently of the resin and hardener components respectively. accomplish. Such foamable adhesive systems, more particularly polyurea resin systems, are disclosed in SU-327224, where it is convenient to mix the foaming composition with the resin at the time of introduction of the polyurea resin curing catalyst.
迄今为止，可发泡的胶粘体系仅以被包含在上述体系中的各组分的混合物的形式施涂到基材上，如US3615975A所述。例如，尤其由于胶粘体系各组分的硬化或部分硬化的混合物在施涂装置中有造成堵塞或积聚的危险，本领域已知的可发泡体系很难循环。此外，由于发泡组合物的存在，因此在施涂设备中可能发泡或出现不希望发生的气体形成。还有，这类施涂的开始和停止，以及长期的操作将很难实施。To date, foamable adhesive systems have only been applied to substrates in the form of mixtures of the components contained in the above-mentioned systems, as described in US3615975A. For example, the foamable systems known in the art are difficult to circulate, not least because of the risk of clogging or accumulation in the application device of the hardened or partially hardened mixture of the components of the adhesive system. Furthermore, due to the presence of the foaming composition, foaming or undesired gas formation may occur in the application equipment. Also, the starting and stopping of such applications, as well as long-term operations, would be difficult to implement.
因此，非常希望提供可发泡胶粘体系的施涂方法，其中上述体系的组分能够循环，其中在将胶粘基材压合在一起之前，发泡剂(即气体)的形成减少到最小程度。还非常希望能够均匀调节发泡(即气体形成)的过程，例如，以便使从施涂到加压的过程经历较长时间，和确保在施涂的组分中，尤其在加压过程中气体均匀形成。Therefore, it would be highly desirable to provide a method of applying a foamable adhesive system in which the components of the above system can be recycled, wherein the formation of blowing agent (i.e. gas) is minimized prior to pressing the adhesive substrates together degree. It is also very desirable to be able to regulate the process of foaming (i.e. gas formation) uniformly, for example, in order to make the process from application to pressurization take a long time, and to ensure that in the applied components, especially during pressurization, the gas Formed evenly.
而且，非常希望发现用于可发泡胶粘体系的单独施涂的简单施涂体系，它能够被调节成上述胶粘体系和所需的组装时间。还有，非常希望发现需要少量用于提供改进的粘接效果的气体产生物质的可发泡胶粘体系。Furthermore, it would be highly desirable to find a simple application system for a single application of the foamable adhesive system, which can be adjusted to the aforementioned adhesive system and required assembly time. Also, it would be highly desirable to find foamable adhesive systems that require small amounts of gas generating substances to provide improved bonding.
组装时间指的是从胶粘体系施涂到基材上的时刻到有待胶粘在一起的基材压合的时刻所经过的时间。Assembly time refers to the time elapsed from the moment the adhesive system is applied to the substrate to the moment the substrates to be glued together are pressed together.
因此，本发明提供包括树脂组分和酸性硬化剂组分的可发泡胶粘体系的组分的单独施涂方法和适合实施该方法的装置，借此获得增强的粘附和强度性能并且克服上述问题。Accordingly, the present invention provides a separate application method for the components of a foamable adhesive system comprising a resin component and an acidic hardener component and a device suitable for carrying out the method, thereby obtaining enhanced adhesion and strength properties and overcoming above question.
本发明方法被限定在所附权利要求书中。它包括通过使用包括树脂组分和硬化剂组分的可发泡胶粘体系将片型基材胶合在一起，其中硬化剂组分呈酸性，树脂组分包括一种或多种当与硬化剂接触时能形成气体的产气物质，因此树脂和硬化剂组分被单独施涂到基材上。The method of the invention is defined in the appended claims. It involves bonding sheet-type substrates together by using a foamable adhesive system comprising a resin component and a hardener component, wherein the hardener component is acidic, and the resin component includes one or more A gas-generating substance that forms a gas on contact so that the resin and hardener components are applied separately to the substrate.
用于本发明方法的酸性硬化剂组分包括有机或无机酸如盐酸，或酸性盐如氯化铵。尤其适合的酸类是有机酸。后者的合适实例是对甲苯磺酸和羧酸，其中后者是优选的。适合的有机羧酸的实例是甲酸，柠檬酸和马来酸，其中甲酸和马来酸是优选的。Acidic hardener components useful in the method of the present invention include organic or inorganic acids such as hydrochloric acid, or acidic salts such as ammonium chloride. Especially suitable acids are organic acids. Suitable examples of the latter are p-toluenesulfonic acid and carboxylic acids, with the latter being preferred. Examples of suitable organic carboxylic acids are formic acid, citric acid and maleic acid, with formic acid and maleic acid being preferred.
所用硬化剂也有为反应体系提供产气组分的附加功能。产气反应体系的其它组分是产气物质。所述产气物质以与胶粘体系的树脂组分混合的形式被提供。The hardener used also has the additional function of providing a gas-generating component to the reaction system. Other components of the gas-generating reaction system are gas-generating species. The gas generating substance is provided in admixture with the resin component of the adhesive system.
取决于胶粘体系中组分的反应活性，所需的组装时间，对于基材被硬化剂中所用酸损坏和散发到周围氛围如工作环境中的酸蒸汽排放量的特殊考虑，后来施涂的线条分别可重叠、不重叠或不接触相应的先前施涂的其它组分的线条。Depending on the reactivity of the components in the adhesive system, the required assembly time, special considerations for damage to the substrate by the acid used in the hardener and the emission of acid vapors into the surrounding atmosphere such as the working environment, later applied The lines may respectively overlap, not overlap or contact corresponding previously applied lines of other components.
这里使用的术语“线条”也包括本领域常用术语“条带”和任何其它类似术语的含义。The term "line" used here also includes the meaning of the commonly used term "strip" and any other similar terms in this field.
本发明的装置被限定在所附权利要求书中，可用于实施该方法，其中可发泡胶粘体系的组分以线条形式施涂到基材上。The device of the invention, defined in the appended claims, can be used to carry out the method in which the components of the foamable adhesive system are applied to the substrate in the form of lines.
本发明尤其提供使用其基本成分的数目减少的可发泡胶粘体系的优点。此外，根据本发明，在施涂胶粘体系之前，不需要包括将产气体系加到胶粘体系或其任意组分中的步骤。而且，根据本发明，仅需要少量产气物质，这样促使胶粘产品的粘附和强度性能得到改进。The invention offers, inter alia, the advantage of using a foamable adhesive system whose number of essential components is reduced. Furthermore, according to the present invention, there is no need to include the step of adding the gas generating system to the adhesive system or any of its components prior to applying the adhesive system. Furthermore, according to the present invention, only a small amount of gas-generating substances is required, which leads to improved adhesion and strength properties of the glued product.
本发明的技术对氨基树脂体系尤其有用，该体系中的硬化剂一般呈酸性。这类体系的实例是：脲-甲醛，蜜胺-脲-甲醛，蜜胺-甲醛，蜜胺-脲-酚-甲醛树脂，和它的糠醇改性变体。The technology of the present invention is especially useful in amino resin systems where the hardener is generally acidic. Examples of such systems are: urea-formaldehyde, melamine-urea-formaldehyde, melamine-formaldehyde, melamine-urea-phenol-formaldehyde resins, and furfuryl alcohol-modified variants thereof.
产气物质可以是任何在与酸接触后产生CO2的碳酸盐或碳酸氢盐。适合的实例例如是碳酸氢钠，碳酸钙，碳酸钠，碳酸铵，碳酸氢铵，碳酸镁，或它们的混合物。优选使用碳酸钙和/或钠。产气物质正常以0.1-10wt％，合适为0.1-5wt％，优选0.15-2wt％和最优选0.15-1.9wt％的量包括在树脂组分中，按纯的、活性形式的上述物质，即产生气体的形式计算，排除任何杂质。The gas producing species can be any carbonate or bicarbonate that produces CO2 upon contact with an acid. Suitable examples are eg sodium bicarbonate, calcium carbonate, sodium carbonate, ammonium carbonate, ammonium bicarbonate, magnesium carbonate, or mixtures thereof. Preference is given to using calcium carbonate and/or sodium. The gas-generating substance is normally included in the resin component in an amount of 0.1-10 wt%, suitably 0.1-5 wt%, preferably 0.15-2 wt% and most preferably 0.15-1.9 wt%, in pure, active form of the above-mentioned substance, i.e. Calculate the form of gas produced, excluding any impurities.
与用在硬化剂中的酸接触产生低沸点气体的其它产气物质也能够用于本发明。这类气体的实例例如是氨，二氧化氮等，不过从例如环保观点出发它们并非优选。Other gas generating substances that generate low boiling point gases in contact with the acids used in the hardener can also be used in the present invention. Examples of such gases are, for example, ammonia, nitrogen dioxide, etc., although they are not preferred from the viewpoint of, for example, environmental protection.
产气物质例如也能够与普通填料如高岭土，或它的混合物一起使用。然而，当所用填料包括或构成一种或多种本文所用产气物质时，纯活性形式的这类物质的总量应保持在上述范围内。Gas-generating substances, for example, can also be used together with common fillers such as kaolin, or mixtures thereof. However, when the filler used comprises or constitutes one or more gas-generating substances as used herein, the total amount of such substances in pure active form should remain within the above range.
在本发明方法中，构成胶粘体系的两组分单独施涂。胶粘体系的施涂例如可通过幕涂，喷涂或线条型施涂，或者上述方法的任何组合方式完成。优选各组分以单独线条形式施涂。In the method according to the invention, the two components making up the adhesive system are applied separately. The adhesive system can be applied, for example, by curtain coating, spray or line application, or any combination of these methods. Preferably each component is applied in separate lines.
在可发泡的胶粘体系施涂到基材例如木质薄板上后，各基材被放在一起，再压成聚集体例如木梁。After the foamable adhesive system has been applied to substrates such as wood veneers, the substrates are brought together and pressed into aggregates such as wooden beams.
优选的是，在可发泡胶粘体系中气体的大量产生基本上发生在上述体系施涂到基材上之后进行压合的时候。因为产气反应在两种组分接触之后开始，所以各组分彼此间的接触理想地应该在开始进行这种压合时才完全实现。因此，本发明方法使用单独施涂是为了将压合之前各组分的接触和混合程度从而将压合之前产气过程发生的程度减到最小。优选的是，为了确保在压合过程中线条的充分可混性，应确保不同线条的有规律的、连续的、最小的接触。从而，能够更仔细地调节产气反应，同时也使在施涂和压合之间经历更长的时间，如如果需要可长达180分钟，优选0-90分钟。这个目的可通过使用以线条形式施涂组分来达到。Preferably, substantial gas evolution in the foamable adhesive system occurs substantially when lamination is carried out after application of the above-mentioned system to the substrate. Since the gassing reaction begins after the contact of the two components, the contact of the components with one another should ideally not be fully realized until the pressing is initiated. Thus, the method of the present invention uses separate applications to minimize the extent to which the components are contacted and mixed prior to lamination to minimize the extent to which outgassing occurs prior to lamination. Preferably, in order to ensure sufficient mixability of the lines during lamination, a regular, continuous, minimal contact of the different lines should be ensured. Thus, the gassing reaction can be more carefully tuned, while also allowing a longer time to elapse between application and pressing, such as up to 180 minutes if desired, preferably 0-90 minutes. This object can be achieved by using the components applied in lines.
取决于胶粘体系中各组分的反应活性和所需的组装时间，不同组分如硬化剂和树脂的线条彼此之间能以不同的适宜方式施涂。因此，对于低反应活性/慢固化胶粘体系和/或短组装时间来说，适宜的是，后来施涂的一种组分的线条重叠先前施涂的组分的相应线条，或者它们以彼此邻接的方式被施涂，以致它们基本上相互接触。当使用高反应活性/快固化胶粘体系时，和/或需要长组装时间，适宜的是，后来施涂的一种组分的线条以相对于先前施涂组分的相应线条一定距离来施涂。对于大约60-120分钟的组装时间，在胶粘体系中不同组分如硬化剂和树脂的线条之间有大约4-8mm的距离是适合的，对于大约15-60分钟的组装时间来说，大约2-4mm的距离是优选的，以及对于大约至多15分钟的组装时间来说，线条的重叠或它们之间基本上接触是优选的。Depending on the reactivity of the individual components of the adhesive system and the required assembly time, strands of different components such as hardeners and resins can be applied in different suitable ways relative to each other. Therefore, for low-reactivity/slow-curing adhesive systems and/or short assembly times, it is expedient that the lines of one component applied later overlap the corresponding lines of the previously applied component, or that they follow each other. They are applied in a contiguous manner such that they are substantially in contact with each other. When highly reactive/fast curing adhesive systems are used, and/or long assembly times are required, it is advisable that the lines of one component applied later are applied at a distance relative to the corresponding lines of previously applied components painted. For an assembly time of about 60-120 minutes, a distance of about 4-8 mm between lines of different components such as hardener and resin in the adhesive system is suitable, and for an assembly time of about 15-60 minutes, A distance of about 2-4mm is preferred, and an overlap of the lines or substantial contact between them is preferred for an assembly time of about at most 15 minutes.
在压合过程中，两组分在被压合在一起的各片基材之间有一定程度流动，从而各组分彼此间的混合程度比压合之前更高，从而彼此更紧密接触。在这种方式中，主要的产气发生在压合过程中。在压合过程中的气体形成还有助于一定程度的混合。During lamination, the two components flow to a certain extent between the sheets of substrate being bonded together so that the components are mixed with each other to a higher degree than before lamination and thus come into more intimate contact with each other. In this way, the main gas generation occurs during the pressing process. Gas formation during pressing also contributes to a certain degree of mixing.
因此，在本发明方法的一个实施方案中，使用以线条形式单独施涂组分的方法。Thus, in one embodiment of the method according to the invention, a method is used in which the components are applied individually in the form of lines.
用于本方法的组分的这种施涂的适合装置包括具有至少两个中空部件的单元，至少一个部件用于每一组分，在各部件中有许多设计用来施涂各组分到在上述中空部件之下的基材上以形成线条的孔，中空部件被定位在施涂平面之上，其中一个中空部件的各孔在加工方向上相对于其它中空部件的相应孔呈直线排列。该装置能使胶粘体系的组分如树脂和硬化剂施涂到基材上，其中后来施涂的一种组分的线条重叠在先前施涂的其它组分的线条上。Suitable means for such application of the components of the method include a unit having at least two hollow parts, at least one part for each component, a number of which are designed to apply each component to A line of holes is formed in the substrate below said hollow parts, the hollow parts being positioned above the application plane, wherein the holes of one hollow part are aligned in the machine direction with respect to the corresponding holes of the other hollow parts. The device enables the components of the adhesive system, such as resins and hardeners, to be applied to the substrate with lines of one component applied later superimposed on lines of the other component applied earlier.
用于本方法中组分的这类施涂的另一适合装置包括具有至少两个中空部件的单元，至少一个部件用于每一种组分，在各部件中有许多设计用来施涂各组分到在上述中空部件之下的基材上以形成线条的孔，中空部件被定位在施涂平面之上，其中一个中空部件的各孔在加工方向上相对于其它中空部件的相应孔平行设置。该装置能使胶粘体系的组分如树脂和硬化剂施涂到基材上，取决于所用的胶粘体系和所需组装时间，其中后来施涂的一种组分的线条以相对于先前施涂的其它组分的线条一定距离来施涂。Another suitable device for this type of application of the components in the method comprises a unit having at least two hollow parts, at least one for each component, a number of which are designed to apply each component to the substrate below the aforementioned hollow parts to form a line of holes, the hollow parts being positioned above the application plane, wherein each hole of one hollow part is parallel to the corresponding holes of the other hollow part in the machine direction set up. This device enables the components of the adhesive system such as resins and hardeners to be applied to the substrate, depending on the adhesive system used and the required assembly time, where the lines of one component applied later are different from those of the earlier ones. Lines of other components of the application are applied at a distance.
以线条形式单独施涂的优选方法是其中使用上述装置，从而所用组分的相应线条在所述线条的全长中彼此基本连续接触的方法。A preferred method of applying individually in lines is one in which the apparatus described above is used such that the respective lines of the components used are in substantially continuous contact with each other over the entire length of the lines.
在这种方式中，确保了在施涂的时候树脂和硬化剂线条均匀接触，与此同时，直到压合的时候产气的两种组分才达到更充分混合。In this way, uniform contact of the resin and hardener lines is ensured at the time of application, while at the same time a more thorough mixing of the two components which generate gas is not achieved until pressing.
作为本发明方法的另一个适合实施方案的例子，其中树脂组分优选首先以线条形式施涂，该线条任选能够聚结以形成基本连续层，硬化剂组分以线条的形式或以喷涂的方法施涂于该层之上。例如当需要最大限度地减少硬化剂和基材的接触时，该实施方案是适合的。As an example of another suitable embodiment of the method of the present invention, wherein the resin component is preferably first applied in a line, which line is optionally capable of coalescing to form a substantially continuous layer, the hardener component is applied in a line or in a sprayed The method is applied on top of this layer. This embodiment is suitable, for example, when it is desired to minimize contact of the hardener with the substrate.
在以下两个实施例中，用普通的无发泡胶粘体系和用本发明的可发泡体系，分别通过依次单独线条施涂两种组分，提供大致平滑的云杉木片。此后，分别由带有无发泡和可发泡胶粘体系的片材形成层压板，随后，测试层离性能。In the following two examples, substantially smooth spruce wood chips were provided by sequentially applying the two components in separate lines, respectively, with a conventional non-foaming adhesive system and with a foamable system according to the invention. Thereafter, laminates were formed from the sheets with non-foamed and foamable adhesive systems, respectively, and subsequently, the delamination properties were tested.
实施例1Example 1
基材： 90cm×15.5cm云杉片材Substrate: 90cm×15.5cm spruce sheet
树脂组分： SL97044(蜜胺-脲-甲醛树脂，含有作为产气Resin component: SL97044 (melamine-urea-formaldehyde resin, containing
物质的碳酸钙)Substance Calcium Carbonate)
树脂中产气物质含量： 1wt％Content of gas-generating substances in resin: 1wt%
硬化剂组分： 甲酸型Hardener component: Formic acid type
树脂/硬化剂摩尔比： 100∶30Resin/hardener molar ratio: 100:30
施涂量： 400g/m2 Application amount: 400g/m 2
施涂次序： 树脂，然后硬化剂Sequence of Application: Resin, then Hardener
施涂后，层压板在7-8巴压力下压合过夜。固化一天后，对层压板测试层离性能。结果表示在下表中。After application, the laminates were pressed overnight at 7-8 bar pressure. After one day of curing, the laminates were tested for delamination properties. The results are shown in the table below.
实施例2(对比) Embodiment 2 (comparison)
重复实施例1，唯一的不同是所用树脂组分是SL97043(不含产气物质的蜜胺-脲-甲醛树脂)。得到的层压板以与上述相同的方式进行测试，结果给出在下表中。Example 1 was repeated except that the resin component used was SL97043 (melamine-urea-formaldehyde resin without gas-generating substances). The resulting laminates were tested in the same manner as above and the results are given in the table below.
表
*SL97044＝SL97034+产气物质*SL97044=SL97034+gas producing substance
从表中可以明显看出，与用无发泡胶粘体系形成的层压板的结果相比，使用本发明胶粘体系形成的层压板的层离结果得到显著改进。层离效果根据EN-391-B测定。It is evident from the table that the delamination results are significantly improved for laminates formed using the adhesive system of the present invention compared to the results for laminates formed with the non-foamed adhesive system. The delamination effect is determined according to EN-391-B.
因此，这些实施例明显证实与使用无发泡胶粘体系相比，采用其中使用可发泡胶粘体系的本发明方法呈现改进效果。These examples thus clearly demonstrate the improved effect of the process according to the invention in which a foamable adhesive system is used compared to the use of a non-foamable adhesive system.
Claims (16)
Applications Claiming Priority (18)
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| SE98035512 | 1998-10-16 | ||
| SE98035504 | 1998-10-16 |
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